Vertical boring mill



May 22, 1928.

F. S. JONES VERTICAL BORING MILL Filed July 9, 1925 4 Sheets-Sheet May21?, 1928. 1,670,772

r F. s. JONES VERTICAL BORING MILL Filed July 9, 1925 4 Sheets-Sheet 2lll May 22, 1928. 1,670,772 F. s. JONES VERTICAL BORING MILL Filed July1925 4-sheets-sneet 5 May 22, 1928. 1,670,772

' F. S. JONES 1 VERTICAL BORING MILL Filed July 9, 1925 4 Sheets- Sheet4 6 "i, J V 1 4 i8 /4/6 15 I if 14 it: m \J \K 7,

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a V g7 a .15 1Q 2% ifl-illifl U-L- b o 00 q z outwardly from its center.

rests upon opposed wedge-blocks 10 which Patented May 22, 1928.

UNITE 1 er FRANK s. JONES, or rmmnm m, rnitrisrnvanra. i

' -VER'1ICAL. seamen/Iran. Y

Application filed July 9, 1925. Sean No. 412,366]

In turning and boring mills of the vertical type, employed upon heavywork, the friction between the table and its bearings is so great thatit is commercially impractical to rotate the table except at slow speedand it is a time consuming and therefore expen sive job to impart asmooth finish to the work.

The object of my invention is to provide simple and efficient mechanicalmeans for relieving the friction whereby a smoothfinish may be quicklyimparted to the work without increase of power.

These objects, and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which Figure 1 is a vertical sectionthrough the table and its bearings, of a boring mill embodying myinvention,

Figure 2 a section on line 2-2 ofFigure 1,

Figure 3 a section on line 33 of Figure 1,

Figure 4 a section on line H of Figure 1',

Figure 5 a section on line 55 of Figure 1,

Figure 6 a fragmentary vertical section on the same line as that ofFigure 1 showing a modified form of my invention, and

Figure 7 a like View showing another modification.

In the drawings, the numeral 1 designates the column of a boring mill, 2the rotatable table, 3 the table-spindle and 4 the bearing frame for thetable in which 5 is an annular flat bearing near the outer edge of thetable, 6 the bearing member for the spindle, the bearing member having,at its lower end, a

collar 7 embracing the lower end of the spindle. At its lower end thespindle is carried upon an anti-friction step-bearing 8 which is carriedby an annular support 9 having its under face inclined upwardly and Thissupport are reversely threaded and are connected by a reversely threadedscrew 11 which has its hearings in collar 7. A pinion 12 is fixed toscrew 11, outside collar 7 and meshes with a pinion 13 on a shaft 14having one hearing in collar 7 and the other bearingin a bracket 15extending from the base 16. Pinion 13 is fixed to or integral with amiter gear 17, rotatable on shaft 1 1 and meshing with a mitergear 18fixed to a shaft 19,

which has one bearing in bracket 15, extends through the outer wall ofbearing frame at, has its other bearing in a bracket 20 fixed to orintegral with said wall, and has an angular end 21 to which a wrench maybe applied. I By imparting rotation to shaft 19, motion 1S transmittedthrough gears 18, 17, 13 and 12 to screw -11, rotation of which drawswedge-blocks 10 toward each other. The wedge-blocks, acting upon theinclined faces ofbearing member 9, raise spindle 3 thereby releasingpressure and relieving the friction on the annular bearing 5 and enabling the table to be rotated at high speed without increase in power.

In the form shown in Figure 6 I have shown the table-spindle supportedupon a bearing member 9 having but one inclined face and engaging with asingle wedgeblocklO which, is actuated by a. screw 11 threaded in butone direction.

In the form shown in Figure 7, I have shown the spindle supported uponroller bearings 8? instead ofupon ball-bearings, the arrangement ofparts beingotherwise the same as in- Figures 1 to 5.

The operation in each case is practically the same.

While I have described my invention as 1 taking a particular form, itwill be understood that the various parts may be changed withoutdeparting from the spirit thereof, and hence I do not limit myself tothe precise construction set forth, but consider that I am at liberty tomake such changes and alterations as fairly come within the scope of theappended claim.

Having thus described my invention, what I claim asenew and desire tosecure by Letters Patent is In a vertical boring mill having a frame,table and spindle bearings on the frame, a table rotatable on the tablebearing, and a spindle rotatable in the spindle bearing; means forraising and lowering the table in cluding a base; opposed wedge blockswith-.

in the spindle bearing and slidable upon the IUD base; a support, havinginclined underfaces,

screw shaft threaded through the wedge blocks and rotatably mounted inthe walls of the spindle bearing; anti-friction bearings encircling eachend of the screw shaft for taking the thrust thereof; a gear fixed onthe screw shaft; a bracket formed onthe base; a jack shaft rotatable inthe bracket and in the side of the spindle bearing; a with the bevelgear; and meansonthe other pinion fixed 0n the jack shaft and meshingend of the adjusting shaft whereby said with the gear; a bearing on thebracket; an shaftinay be rotated for raising or lowering 10 adjustingshaft rotatable in the bracket the table. ee bearing and in the frame; abevel gear fixed In testimony whereof I have signed my on the jackshaft; a bevel pinion fixed on name to this specification.

FRANK S. JONES.

one end of the adjusting shaft and meshing

